Bank building structure



FIG. 1 is a front elevation view of the bank building structure, showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is an elevation view of one side thereof;

FIG. 4 is an elevation view of the other side thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken (phantom) lines in FIGS. 1-6 are included solely for illustrative purposes and form no part of the claimed design. 

We claim the ornamental design for a bank building structure, as shown and described. 